Mix your EOs in the desired proportions, and add a carrier oil. You could probably use a portion of any fixed oil going into your product. Jojoba is what I use, diluting the EOs to 50%. Adding as little as 25 or even 10% of the carrier oil might be enough. Apply some gentle warmth- body heat is generally enough. I carry the (very tightly closed!) bottle around in a pocket for half an hour or so. Give it a good swirl, or even a shake and you should have a nice, even distribution. It occurs to me though, that you'll probably wind up with a big bottle. So, warm water bath. Not so hot it's uncomfortable to stick your hand in.